Spindle bumper



Sept. 16, 1952 D. A. AHLSTRAND 2,610654 SPINDLE BUMPER Filed Sept. 20,1950 myc/a5.

Patented Sept. 1 6, 1952 i UNITED STATE Y SPINDLE BUMPER David A.Ahlstrand, Atlanta, Ga. v

Application September 20, 1950, Serial No. 185,886

for one purpose to providev a spindle bumper of increased life andefciency.

Another purpose is to provide a spindle bumper in which breaking underwear is reduced to a minimum.

Another purpose is to provide a spindle bumper in which relatively smallpieces of inexpensive material may be employed.

, Another purpose is to provide a spindle bumper in which, upon breakageor wear, only part of the spindle bumper structure need be replaced. f

Another purpose is tok provide a spindle bumper, the cost of which issubstantially reduced in relation .to the spindle bumpers in currentuse.r

Another purpose is rto provide a spindle bumper which may be formed of awide variety of material, includingplastics, textiles, rubber and rubbersubstitutes, in avariety of combinations.

Other purposes will appear from time to time in the course of thespecification and claims.

I illustrate, my invention more or less diagrammatically in theaccompanyingdrawings wherein:

Figure F1 is a side elevation of one embodiment of my invention;

Figure 2 is a yside elevation of bodiment of n my invention;

` Figure 3 is aside elevation of a third embodiment of my invention;and.

Figure iis a side elevation of a Vfourth embodiment of my invention.

`Likeparts are indicated by like symbols throughout the specificationand drawings.

Since Indo not claim any novelty in the mechanism on which the spindlebumper is used, I illustrate herein only the spindle bumper structureitself.

Referring to the drawings, I indicates an app1icator.` Ihe applicatorhas for its purpose tov apply the bumper structure to the spindleitself. The applicator may be made of any suitable material, preferablyvof'a cheap material, so that, `if desired, the applicator may be thrownaway after use. `It enables the bumper structure to be veasily appliedto the spindle. The spindle is not herein shown, but the applicatoranother emcan be taken as typical of a rod or spindle struc- 11 claims.(o1. 139-166) the machine shaft or spindle, and the straps are pushedAoff of the applicator shaft and ontothe machine shaft.v -On thespindle, the bumper parts are positioned as shown on the applicator inthe drawingsherein.

It will be understood that the bumper, when used in textile Weaving,absorbs the shock which, in machines now available, is absorbed by aunitary strap formed in a plurality of bends. In the use cf the forms ofmy invention, in Figures 1 and 2, no piece of material is subjected tomore than one bend. Taking, for example, the form of Figure 1, I providea plurality of relativelyshort straps 3, each Aof which isbent to form aU, having, in its opposite arms, apertures 3a and 3b. y'Ihese aperturesare of sufiieient size to permit the U-shaped bent strap 3 to be appliedreadily to the applicatorr I, being passed over its tapered end Ia. vIfind it advantageous, in the members 3, to employ pieces or strapswhich, if desired, may be arranged in multiple plies. I illustrate, inFigure 1, the separate plies formed by adding an additional ply 3c tothesingle ply or member `3but, if desired, more than two plies may beemployed, depending upon the material used. `The plies may be connectedby cementing, by'sewing, or by any other suitableikmeans. I may' employmultiple plies of any suitableplastic, including, but not limited tonylon. I may employ rubber, or any suitable rubber substitute. Undersome circumstances, `it may be advantageous to employ leather, eitheralone or in-connection with a ply or plies of rubber or some othersubstance.

In the present application I emphasize, primarily, the form rather thanthe substance of the various pieces employed.

. In the form of Figure 1, I illustrate, for eX- ample, five U-bentshort piecesl or straps arranged in interpenetrating relationship, withthe arms ofthe Us at oneside of the applicator I entering .the folds ofthe Us atthe opposite side ci? the applicator. Where five of the Us` areemployed, as in Figure 1, I maintain the individual straps or partsproperly positioned by -usingany suitable intermediate blocks or bits 4within the folds of the end members ofthe series of Us. Each such block4 maybe made rectangular, or of any othersuitable form, and may beaperturedfas at 4a, to be readily'applied to the applicator. The partsare so dimensioned, when rectangularly formed, that the blocks 4 may beheld against rotation by theadjacent bends of the U. I may also employany suitable end blocks orz'washersji, 5 with the apertures 5a.

The form of Figure 1 merely illustrates one satisfactory arrangement. InFigure 2, the individual U-shaped strap elements 6 are shown with theirarms arranged in abutting relationship. An additional ply 6a may beadded to the single ply or member 6. I may iind it advantageous toprovide one or more intermediate or inner blocks or Washers 'I withinthe bend of each U. I also illustrate the terminal blocks or washers `8,as in the case of the form of Figurel.

In the form of Figure 3, for the U-shaped members or short straps, Iprovide loops III each having overlapping ends Ina. and Ib. Idiagrammatically indicate, at Inc, any suitableadditional ply or plieswhich may be employed. II

indicate inner blocks or spacers, andy I2 indicate' end members orspacers. Any suitablernumber of spacers may be used.

In the form of Figure 4, I illustrate straps bent', in eiect, to formreverse Us. Each such strap I4 is formed with loops: I4b andrrllc.Nadia'- grammatically` indicates any Vsuitable additional ply or'plies.Each such memberis. aperturedat three points, asat Md, I4e and Il'toc'permit the passage of the applicator I. The straps are: thenpositioned in intertting arrangement,- as: vshown in Figurev 4,lwiththefree end of. eachstrap entering the bend of an adjacent strap. Attheend bends, spacers I5 maybev used.y I6 indicateV the end spacers.

All forms of my 'device` have, in common,` the useY of a plurality ofrelatively short: pieces or strap members; In'the' formsoifFigures-.land 2, each strap' has a single bend. In thetormsof Figures3 and 4, eachstrap has two bends;v In order toreduce'the-.bendingstressea and;to'pre vent over-bending; Iv mayI employany suitable spacers, such as arefsh'own att-'in Figure-.1, at' I inFigure 2, at I I in Figure 3,.an`d atv I.5- in Figure 4. The number andspacings may be` widely varied to suit" particularV needs.`

Itv will be realizedl that, whereas, I have described and illustratedVone pra'cti'cal and operative device, nevertheless many changes may bemade in the size, shape,.number. and disposition of parts withoutdeparting from *theV spirit'v of my invention. I. therefore wish'-mydescripti'on and drawings tobe taken asin a broad sensefillustrativeor asi diagrammatic. rather than. as limiting me to my precise-showing:

I'he use andoperation oi'my inventionA are-as follows:

In current Weaving equipment itis' customary to use spindle bumpersformedof a single p ie'ce. These pieces are hard to apply tuvthefspindles,

and break easily at the radius off the individual bends.

In the use of my invention- Ifpr'ovide afsstructure which eiiicientlyabsorbsthe' shocks jwliich the spindle bumper has to absorb; Mydeslgnmaintains the radius of each piece an'dprevents a break in the radius.The radius' is maintained by the interpositiorr of the free ends'of`adjacent pieces, and, where necessary,v bythe insertion of spacersv suchas arefshownin the variouslgures; This' maintenance ofi radiustassurescontinuatiorr ofthe compression effect. cfithe beni*I pieces.'Ihe use of shortpieces inzplaceof. the. former onepiece`elementslmplifies the replacement of worn or broken pieces. The form ofFigure l has the advantage of reducing to aminimunr the spacers, whichrare usedin greater numbers in'theform of Figures 2 and 3. In otherwordstheinterpene trating ends of the. Usin the. form of Figures. l.

and 4A themselvesconstitute spacers andreduce the necessityfor usingintermediate spacers.

It will be realized that I may employ multi-ply elements or pieces. Inuse, the bumper structure, as a whole, is supplied to the user on anapplicator in which the individual parts are positioned as they will bepositioned on the spindle. The applicator is aligned with the spindle,and the parts are easily slid from the applicator upon the spindle. Byusing a relatively large number of small parts I find it simple and easyto move the parts from the applicator to the spindle, and to positionthemv properlyon the spindle'. A minimum of force has to be applied,force entirely insufficient to damage the bumper elements.

l I claim:

1. In a spindle bumper structure, a multipiece bumper including aplurality of bent straps arranged iii-'abutting relationship. each suchstrap having a pair of free ends and an intermediate curvilinearportion, the free ends ot all the straps being apertured and beingthereby adapted to-beapplied to aspindle.; and s *tree end of each:strap being disposed adjacentfthe curvilinear portion ofxan'adjacentstrap.

2. The structure of claim 1 characterized. in

that the bent straps arezformed oI-multipleplies.

3. The structure of claim 1 characterized in that the straps are bentinto U-shape with. the arms of adjacent straps abutting.

4. In a spindle bumpervstructur'e,v a` multipiece bumper'including a:plurality of bent-straps arranged in abutting relationship. each such'strap having overlapping free ends, the. free ends of all the; straps,andv an intermediateY portion. ot each strap, being apertured inalignment andbeing, thereby adapted to be applied.v to a. shaft,eachstrap having aninner freelend and an outer free, end, the outerfree; end' ot' each strap abutting an intermediate portion of anadjacent strap.

5; In a spindle bumper structure, a multi-piece bumper including a'plurality of bent straps arranged in abutting relationship, each suchstrap having. apair offree ends and two intermediate. oppositely facing,U-shaped bends, each strap being apertured at' three. points and beingapplicable. to a spindle.

6. Asa replacement' unit for spindle bumper structures, an applicatoradapted for alignment with a bumper spindle and a multi-piece Vbumperarranged on the applicator; withthe individual pieces of the multi-piecebumper in the relationship they will havewhen applied tov the-spindle.

7. As a replacement unit for spindle bumper structures, an applicatorladapted for alignment with a bumper spindle and a multi-piece bumperarranged. on the applicator, with the pieces'in the relationship theywill have when applied to the spindle.'- said-multi-plecebumperincluding a plurality offbent straps 'having portions arranged inabutting relationship, each such strap being bent into U-shape andhaving free ends apertured for application to the spindle.

8. The structure of claim 7 characterized in that theA free ends ofadjacent U-shaped straps interpenetrate.

9. Thestructure of claim 'T'cliaracterized` by and includingspacers lonsaid applicator positioned within the U-shaped bends of said straps.

10; As a replacement unitfor spindle bumper structures, an applicatoradapted. for alignment with a bumper spindle and havingan end portionadapted. to receive the end of the. spindle, and a multi-piece. bumperarranged. onthev applicator,

with the individual pieces of the multi-pieceV bumperin rtherelationship they will. havewhen applied to the spindle.

11. As a replacement unit for spindle bumper structures. an applicatoradapted for alignment with a bumper spindle and having an end portionadapted to receive the end of the spindle, and a multi-piece bumperslidably arranged on the applicator, with the individual pieces of themultipiece bumper in the relationship they will have when applied to thespindle, whereby the individual pieces may be readily removed from theapplicator and positioned on the spindle when the spindle is receivedwithin the end portion of the applicator.

DAVID A. AHLSTRAND.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number yNumber Name Date Gusdorf Apr. 26,1921Brammer Oct. 5, 1948 Lesesne Mar. 7, 1950 Bridges Sept. 12, 1950 fFOREIGN PATENTS Country Date Great Britain Sept. 11, 1919 Great BritainApr. 30, 1931

